Extension plane



Nov. 27 1923.

Filed Aug. I5,

F. W. HUMFHlQl-:Ys`

EXTENSION PLANE mmm j 2 Sheets-Sheet l Nov. 27 1923.

F. W. HUMPHREYS EXTENS ION PLANE Filed Aug- 5. 1922 2 Sheets-Sheet 2L/WNTOR a/nWH/m/o/Lreys. mf f v I f f l M W1 TNESSES HIS /ITTM'YPatented Nov. 27, 1923.

UNITED STATES FRANK W. HUMPHREYS, GF OCEAN CITY, NEW JERSEY.

EXTENSION PLANE.

Application led August 3, 1922.

To all whom t may concern:

Be it known that I, FRANK W. I-IUuminers, a citizen of the UnitedStates, residing at Ocean City, in the county of Cape May and State ofNew Jersey, have invented' certain new and useful Improvements inExtension Planes, of which the following is a specification.

My invention relates to wood-working tools and more particularly toplanes.

The object of the invention is to provide an attachment of simpleconstruction by which a short plane may be equipped with a longdetachable face plate and thereby perform the function of a longerplane.

These objects, and other advantageous ends which will be describedhereinafter, I attain in the following manner, reference being had tothe accompanying drawings in which Figure 1 is a plan view of myattachmentl with a plane secured therein,

Figure 2 is a sectional elevation of the device as shown in Figure 1,taken on the line 2 2 of Figure 1,

Figure 3 is a vertical sectional view taken on the line 3-3 of Figure 2,

Figure 4: is a vertical sectional view taken on the line 1 4 of Figure2,

Figure 5 is a plan view of the shoe forming the improvement, and

Figure 6 is a side elevation of the device as shown in Figure 5.

In the drawings, the attachment is shown as consisting of a shoe havinga face plate 7 and sides 8. The shoe is of substantially channel-shape'cross Section and has a slot 9 in the face plate for receiving the bitor blade 10 of an ordinary plane 11.

In order to secure the plane 11 in position, the opposite sides of theshoe are provided near'each end with opposed longitudinal slots 12 flushwith the top surface of the intermediate body portion or face plate ofthe shoe. Cross bars 13 have reduced ends 14 slidable in slots 12 andeach cross bar is adjustably secured in posit-ion by a pair of setscrews 15 which engage the bottom of the shoe and force the reduced endsof the cross bars against the top walls of Slots 12.

Angular locking bars 16 are supported on each cross bar at right anglesthereto, or longitudinally of the shoe, and their inner ends are turneddownwardly as indicated at 17 to Contact with the face plate of planejointer plane.

Serial No. 579,316.

11. The locking bars 16 have longitudinal slots 18 and thumb screws 19are disposed through these slots and threaded in vertical aperturesmidway of the ends of cross bars 13.

In applying a plane to the shoe, cross bars `13 and locking bars 16 arefirst moved outward so that plane 11 will be accommodated between theinner ends of bars 16. By unseating screws 15 and relieving the bindingengagement of ends 111 against the top walls of slots 12, cross bars 13may be moved outward in slots 12. By loosening screws 19, bars 16 may bemoved outward, by reason of slots 18. Screws 15 are tightened before orafter adjustment of locking bars 16 and when plane 11 has been placed inthe shoe, the screws are tightened and ends 17 of bars 16 clamped firmlyagainst plane 11. `This adjustment facilitates the application andremoval of the plane, and the fastening means insures positive retentionof the parts in assembled relation.

When a plane is applied to the shoe as described, the length of theplane will be eX- tended so as to convert a smaller plane into a largerplane, such as a smoothing plane into a fore plane, or a fore plane intoa After the cross bars 13 have been adjusted and anchored by set screws15.v the angular locking bars 16 are adjusted so that downturned ends 17will engage the top of plane 11 and then tightening thumb screws 19,locking bars 16 will be held against movement and the handle and bladeof plane 11 will serve their usual functions when the plane is in use asthus converted. It is to be understood that the device may be adjustedto accommodate different sized planes or those varying in length.

`While I have described my invention as taking a particular form, itwill be understood that the various parts of my invention may be changedwithout departing from the spirit thereof, and hence I do not limitmyself to the precise construction set forth, but consider that I am atliberty to make such changes and alterations as fairly come within thescope of the appended claims.

Havingthus described my invention, what I claim as new and desire tosecure by Letters Patent is 1. An attachment for planes comprising ashoe adapted to receive a plane; ad-

justable clamping means for securing the plane in operative position inthe shoe; and means for permitting movement of said Clamping means tovarious adjusted positions on said. shoe.

2. An attachment for planes comprising a shoe adapted to receive aplane; and elan'iping means on said shoe, said clamping means beingarranged' to be moved to various adjusted positions i'or accommodatingplanes oi various sizes.

3. An attachment for planes comprising a shoe adapted to receive. aplane; supporting means mounted adjacent each end of said shoe andcapable oi longitudinal movement to various adjusted positions; andclamps ifor engaging said plane, said clamps being longitudinallyadjustable on said supporting means- 4. A Convertible shoe torplanes'eornprising a substantially channel-shaped member having sideswith slots; Cross bars longitudinally adjustable in the slots7 andlongitudnal Clamping members adjustably carried by the cross bars andhaving parts at their inner ends to clamp a plane against the shoe.

5. An attachment for planes comprising a substantially channel-shapedshoe having opposed slots in its sides near each end; cross bars havingtheir ends slidable in the slots; means to hold the cross bars inadjuted positions in the slots; locking bars having slotted portionsresting upon the cross bars and downwardly extending prtions at theirinner ends adapted to engage a plane placed in the shoe, and clampingmeans earried by the cross bars and disposed through the slots of thelooking bars to hold the locking bars in adjusted positions.

In testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses.

FRANK W. HUMPHREYS.

Witnesses:

C- RAY, HUI-ases, R. HUMPHREYS-

